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Delineation of groundwater potential zones in Logbadjeck, Cameroun: an integrated geophysical and geospatial study approach
International Journal of Environmental Science and Technology ( IF 3.0 ) Pub Date : 2021-04-07 , DOI: 10.1007/s13762-021-03259-5
N. Tepoule , J. V. Kenfack , E. Ndikum Ndoh , F. Koumetio , C. Tabod Tabod

The locality of Logbadjeck, located in the littoral region of Cameroon, has been investigated using the vertical electrical soundings with a Schlumberger configuration. Eighty vertical electric soundings have been carried out along fourteen profiles oriented in the southwest-northeast direction. The lateral and vertical variations of resistivity in the area were mapping and made it possible to infer the internal structure and determine the presence of aquifers in order to solve the problem of drinking water in the study area. Resistivity maps highlighted the conducting properties of the subsoil. This zone is made up of 3 to 5 layers and the Vertical Electrical Sounding curves obtained were of the KH, K, H, AK and Q types. The resistivity generally varied between 11 Ω.m and 8131 Ω.m and decrease with increasing depth. In addition, areas with discontinuities which can be associated to a fracture, a zone of water infiltration or a very conducting body were also identified and could be potential zones for groundwater prospecting. The very resistive bodies observed in the study area suggest the presence of gneiss. The subsoil of the study area, in turn, highlights the presence of two principal aquifers: shallow aquifers at depths of approximately 6 m and deep aquifers lying between 28 and 56 m of depth. Hydraulic conductivity ranges from 0.1 m/day to 16 m/day while transmissivity ranges from 5 \(m^{2} /day\) to 600 \(m^{2} /day\). The transmissivity results obtained show that the study area is rated low to moderate groundwater potentials. The longitudinal conductance ranging from 0.2 \(\Omega^{ - 1}\) to 1.24 \(\Omega^{ - 1}\) enabled the protective capacity of the aquifer to be classified as moderate to good. The estimated aquifer, protective capacity and the various constructed contour maps, will serve as a useful guide for groundwater exploration and development in the study area.



中文翻译:

勾画喀麦隆洛格巴杰克的地下水潜在地带:一种综合的地球物理和地球空间研究方法

使用具有斯伦贝谢(Schlumberger)配置的垂直电测深仪,研究了喀麦隆沿海地区的Logbadjeck地区。已经沿着西南-东北方向定向的十四个剖面进行了八十次垂直电测深。绘制了该区域电阻率的横向和垂直变化图,从而可以推断内部结构并确定含水层的存在,从而解决研究区域的饮用水问题。电阻率图突出显示了地下土壤的导电特性。该区域由3到5层组成,并且获得的垂直电测深曲线为KH,K,H,AK和Q类型。电阻率通常在11Ω.m和8131Ω.m之间变化,并随深度的增加而降低。此外,还确定了不连续的区域,这些区域可能与裂缝,水的渗透区域或导电性强的区域有关,并且可能是地下水勘探的潜在区域。在研究区域观察到的极高电阻体表明存在片麻岩。研究区域的地下土壤反过来突出了两个主要含水层的存在:深度约6 m的浅层含水层和深度在28至56 m之间的深层含水层。导水率范围从0.1 m / day到16 m / day,而透射率范围从5 研究区域的地下土壤反过来突出了两个主要含水层的存在:深度约6 m的浅层含水层和深度在28至56 m之间的深层含水层。导水率范围从0.1 m / day到16 m / day,而透射率范围从5 研究区域的地下土壤反过来突出了两个主要含水层的存在:深度约6 m的浅层含水层和深度在28至56 m之间的深层含水层。导水率范围从0.1 m / day到16 m / day,而透射率范围从5\(m ^ {2} / day \)到600 \(m ^ {2} / day \)。所获得的透射率结果表明,研究区域被评为低至中等地下水位。纵向电导为0.2 \(\欧米茄^ { - 1} \) 1.24 \(\欧米茄^ { - 1} \)使含水层的保护容量被分类为中度至良好。估算的含水层,保护能力和各种构造的等高线图,将为研究区域的地下水勘探和开发提供有用的指导。

更新日期:2021-04-08
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